Fueling system



Dec. 6, 1932. c, 1' JUSTHEIM 1,889,922

FUELING SYSTEM Filed Aug. 20. 1930 2 Sheets-Sheet 1 C. l. JUSTHEIM Dec.6, 1932.

FUELING SYSTEM Filed Aug. 20. 1930 2 Sheets-Sheet Patented Dec. 6, 1932UNITED STATES PATENT orFic-E FUELING SYSTEM .Applieation filed August20, 1930. Serial No. 476,619.

I My invention relates to the method of obtaining fuel for internalcombustion engines and more particularly to a system or method ofdrawing the fuel from the fuel supply tank to the intake manifoldandwhile so drawing the fuel to carburetor said fuel into such a conditionas is best for instantaneous combustion when introduced into the engine.

A further object is to provide a method of carbureting the fuel at thesame time drawing it from the tank to the enginewith the car buretion ofthe fuel starting at the tank and ending when the fuel is introducedinto the engine.

A still further object is to provide a system or method of drawing thefuel from the supply tank to the intake manifold of an automobile enginewithout the use of vacuum tanks, pumps or other external forces but byvaporizing a large portion of the fuel as it leaves the tank onlydrawing such solid fuel from the tank as is absolutely necessary forstarting, idling and high speeds.

A still further object isto provide a more complete device forcarburetting the fuel for an internal combustion engine which will result in greater mileage per gallon of gasoline and which will be soconstructed as to act as a fueling system as well as a carburetiondevice, to draw the fuel from the tank to the engine.

These objects I accomplish with the device illustrated in theaccompanying drawings in which similar numerals and letters of referenceindicate like parts throughout the several views and as described in thespecification forming a part of this application and pointed out in theappended claims.

In the drawings in which I have shown the best and most preferred mannerof building my invention Figure l is a diagrammatic section of thedevice and the fuel tank all shown sectioned. Figure 2 is a modificationthereof shown diagrammatically and sectioned. Figure 3 is a combinationdevice using all the principles in one device shown sectioneddiagrammatically without the fuel supply tank being shown. Figure 4 is amod ified form of the device. Figure 5 is a section on line 5- 5 ofFigure 1. Figure 6 is one type of spiral which may be used to give arotary action to the fluids passing thereby. Flgure 7 is a modified formof tank showing a float for aiding in the vaporization and 5' catchingof the vapors.

Inthe drawings I have shown only the junction between the intakemanifold and the fueling system with the manifold. shown as A and thecasing of my system shown as B.

The casing B is enlarged at it slower end'into a series ormultiplicityof annular steps 1, 2,

and 3, with cylindrical walls 4: and 5 joining them. Above the joint ofeach step and through the vertical cylindrical walls et and 5 and thelower end 6 of the casing B, I bore radial ports 7 spaced the correctdistance from the junction of the steps and the walls to create a.suction through the ports when per end of the walls 9 inwardlyfrusto-conically to a point 10 where the walls are joined tangentiallyto an outwardly curved portion 11 which curve forms the bottom end ofthetube 8. Thus the wall 6 draws the fluids in-v wardly until they hit thecurve 11 from there the fluids are constricted and drawn through thepoint 10 at which pointan inward suction is created and ports 12 arebored radially thereinto from an annular chamber 13 on the out-sideofthe tube 8 and as the fluids pass through the constriction 10 thesuction is built up in the ports 12 and draws any fluids in the chamber13 into the tube 8 to join those passing therethrough. The flare out ofthe walls 9 increases the suction through the ports 12. A lead line 14connects the chamber 13 with a source of fluid supply such as the tank Cshown in Figure 1 of the drawings. A control valve 15 controls the flowof fluids through the pipe 14. Each of the steps 1, 2, and 3 areprovided with an encompassing ring 16 which ring if formed with asection removed therefrom where it joins the wall and the step, and therings are set into place by screwing them onto threads formed on theouter side of the walls 4, 5 and 6, leaving an annular chamber 1'?around the walls in direct communication with the ports 7. Lead lines18, 19 and 20 join the chambers with-a source of fluid supply and asshown in Figures 1 and 2 this would be vapors from the top of the tankC. The outer edge of the step 3 is joined to a cylindrical wall217forrning a cylindrical chamber 22 therewithin and spaced apartVenturi tubes 23 and 24 are joined'into the bottom of the chamber withthe balance of the space closed to the outer atmosphere by an annularcasting 25 carried medially therein, and having a flange on the bottomside thereof to close that portion of the chamber 22 which is not closedby the tubes 23 and 24. A line 23a connects the chamber 236 of the tube23 with direct flow of liquid fuel from the tank C. It will beobviousthat other tubes maybe used entering into the chamber '22 spacedaround the casting 25, as shown by the dotted lines 26. The bore 27 ofthe casting opens at the top end into the chamber formed by the walls 6.The outer walls of the casting are parallel and the top end is formedinto the frustum of a cone 28 having a screw flange 29 formed on theexterior thereof to direct all fluids into a rotary motion. This flangemay be used or not depending upon the action Iequiredof the fluids. Thecone is spaced from the walls 4 and 5 suflicient distance to allow thewalls to function correctly. A manually operated butterfly valve 30controlsthe flow of fluids through the chamber within the walls Gbelowthe Venturi tube 8 and spring held butterfly valves31 control the amountof air allowed to enter the Venturi tubes 23 and 24. The bore 27 of thecasting 25 is connected with a Venturi tube 33 which tube has the loweroutwardly taper-ed aperture 34 passed through the fuel tank C. T heVenturi tube 33 is formed of diverging walls35 joined tangentially to anoutwardly curved wall 36 and with an annular chamber 37 connected withthe interior of the tube at the tangential juncture of the walls byradial ports38. The annular chamber 37 is connected with a source offluid or vapor supply by a pipe 39.

A butterfly valve 40 controls the flow of air through the opening 34. Ascreen 41 screens all air entering the system through the bottom of thetank and a catch flange 41a prevents any condensed fluids from drainingout of the bottom of the opening 34. The tank introduced through thegrill. the ports and into the fuel in the tank, thereby aerating thefluid and vaporizing a portion of. the fuel in the tank. so that thepipes leading from the top of the tank will draw fuel from the tank inthe form of a vapor. The top end of the inlet pipe 43 is provided withan air cleaner 46 to clean all air entering the tank. A valve 47 isplaced in the line or pipe 39 to shut off all flowof fluids therethroughwhen desired.

The right side of Figure 1 is shown as the device would be built were itused as a carburetor with the combination of a fuel pump or vacuum tank,Lines 48 connect the chamber 17 with the vapors in the float chamber 49and a line 50 connects the chamber 13 with the fuel in the floatchamber. A line 51 leads into the Venturi tube chamber 24a of the tube24 directly from the fuel in the float chamber and a float 52 controlsthe level of fuel in the float chamber. A trap 14a in the line 14catches fuel for starting and prevents back flow of fuel through thepipe 14.

The form of device shown in Figure 2 is modified in that the casting 25is provided with a double frustum of a cone joined together but ofdifferent pitch to the angle of the frustum and the Venturi tubes 23 and24 and 26 are connected with the Venturi tube 35 of the fuel supply tankinstead of opening into the open air. The bore 2'? of the casting 25 isopen to the atmosphere and a manually controlled butterfly valve 55controls the flow of air therethrough or is used toshut the bore as achoke while starting the motor. The lines 23a are connected only withthe vapors on top of the tank C instead of with the fuel in the tank asshown in Figure 1.

In Figure 3 of the drawings 1 have shown a Vent-uri tube 56 connectedwith a source of fluid supply by a pipe 57 leading from the chamber 58and the ports 59. The tapered walls 60 of the lower end of the Venturitube are joined-to an outwardly expanded chamber 61 into which chamberports 62 connect angled chambers 63. The angled chambers 63 are formedof a cylindrical body 64 having steps 65 and 66 formed between thechamber and the ports. Ports 67 are bored into the said steps above thelevel of the joint thereof and encompassing hollow rings 68 are nect therings and chambers with a source of fluid supply preferably vapors asshown in Figure 1 by the pipes 18, 19 and 20. The

lower ends of the chambers 63 are tapered inwardly to form Venturi tubes71, said tube being formed similar-to the tube 56 having the tangentialcurve and tapered walls and having ports 7 2 bored thereinto at thepoint of smallest diameter. The lower ends of the tubes are joined tolead pipes which lead to a Venturi tube in the fuel supply tank such asis shown in Figure 2 of the drawings. A

central bored frustum of a cone 99 is or may be supported centrally inthe chamber 61 by brackets 74 as shown in the tube at the left and theexterior of the said tube will be provided with a spiral 75 to giverotary impetus I to the vapors and fluids passing through the chambers.Pipes connect the annular cham ber 76 of the tubes '5 1 with a source ofliquid fuel supply. In the chamber 61 I provide a spiral deflector 98 torotate the fluids as they pass through the chamber. Valves 77 controlthe flow of fuel through the Venturi tubes 71.

The modified form shown in Figure 4c is showing a side draft, but, maybe used as a down draft device as may allof these devices, by invertingthe general direction of the flow therein and placing them above theintake manifold. The modified form of Figure at is composed of a chamber79 having steps 80 formed on one end thereof through which ports 81connect the interior of the chamber with annular chambers 82 formed inrings 83 and connected with a source of fluid supply by pipes 8 1. Theextreme end of the steps is joined to a chamber. 85 and the end of thechamber 85 is joined to the in take manifold of the engine. An idlingVen turi tube 86 is joined to the chamber 85 and the lower end is opento the atmosphere controlled by a spring held butterfly 87. A lead pipe88 connects the annular chamber 89 of the tube 85 with'a source ofliquid fuel, and a catch pot or pocket 90, ifhorizontal and if verticalthe idling venturi has the catch pot, is formed in the said chamber 85to catch condensed fuel to hold it there for starting, and thelower sideof the chain ber 79 and the steps 80 will also catch fuel therein, toaid in starting. The'end of the chamber 79 is joined to a Venturi tube91 with the lower tapered walls 92 connected with a venturi in the tanksuch as that shown in Figure 2, and a lead line 93 connects the annularchamber 94 with a source of fluid supply in the tank. Ports 95 join thechamber 9-1 with the point of smallest diameter of the tube. A butterfly96 controls the flow of fluids through the tube in the walls 92 thereof.

' In Figure 5 of the drawingsI have shown the angled tangentialdirection of the ports into the Venturi tube and this style of boringmay be adopted wherever ports are desired into'the Venturi tubesthroughout the device. Also the elevation of the ports may be varied orthey'may be bored in rotation each one higher than the last making acurve or spiral of the incline of the p0rts,thus aiding in the rotaryaction of the fuels hrough the Venturi tubes. n

In Figure 6 of the drawings 1 have shown a modified type of spiral whichmay be used either between'the walls 6, in Figure 1 or wherever spiralsof the other type are shown to aid in theefficiency of the device.

In Figure 7 of the drawings I have shown a form of tank withthe Venturitube 102 the top of the tank. An" annular chamber connects the pipe 103with the ports leading 1 into the Venturi tube 102, andthe walls 105 aretapered out to a step 106, which step is connected with a cylinder 107which in turn extends down through the tank. A lead pipe line 108connects ports in the step 106 with the top-of the tank. Within the tanka float 109 is provided having the top side closed to hold vaporstherein and having vertical stand pipes 110 and111 leading up into thepipes 103-and 108 respectively, the pipes to carry fuel vapors fromwithin the float close to the fuel surface, up and into the pipes 103and'108. A pipe 112 leads into a pipe 113 which may be connected withother parts of the sy'stemor may beused just as a guide'for the float.'A butterfly valve 114: controls the suction of air for starting andrunning the motor 'and a butterfly 115 controls the speed ofthe motor.

. The main principles of my invention are to vaporize the fuel partly inthe tank and finally at the engine, but in some instances I'have foundthat the fuel is completely carburetted in the venturi at the tank andno other Venturi tube is necessary, as this alone will operate theengine.

Having thus described my invention I desire to secure by Letters Patentand claim: 1. In a fueling system for engines the com-' bination of aVenturi tubeformed of an inverted frustum of a cone formed integral andtangential to a curved surface and hav ingthe extendedside walls taperedoutwardly from the curve; step cuts formed adjacent the tapered wallsVenturi tubes leading into a chamber below theistep cuts ports fromannularchambers into the side walls of the step cuts; ports-into theVenturi tube at its tangential juncture; an annular chamber around saidVenturi tube in open connection with said ports; a lead line connectingsaid annular chamber in said Venturi tube with a source of fluid supply;lead lines connecting the annular chambers around the step iii.

cuts with a source of fluid supply; a tapered walled member through'thefuel supply tank; a Venturi tube on the upper end of said member; a pipeconnecting the central opening of the chamber below the step cutswiththe Venturi tube at said tank; a lead line connectfrom annularchambers into the side walls of the step cuts; ports into the venturi atits tangential juncture; an annular chamber around said Venturi tubeinopen connection with said ports; a lead line connecting said annularchamber in said Venturi tube with a source of fluid supply; lead linesconnecting the annular chambers around the step cuts with a source offluid supply; a tapered walled member through the fuel supply tank; aVenturi tube. on the upper end of said member; a pipe connecting thecentral opening of the chamber below the step cuts with the Venturi tubeat said tank; a lead line connecting said Venturi tube with the uppervapors on top of said tank; and means by a float to 7 direct vapors fromsaid tank directly into said lead lines through vertical lead pipesinserted within said first mentioned lead lines.

3. In a fueling system-the combination of a chamber secured to theintake manifold; another chamber spaced from the first chamber by steps;a Venturi tube leading into said last mentioned chamber; an annularchamber surrounding the constricted portion of said venturi; portsleading into said venturi from said chamber atanangle to the radius andeach port being slightly raised or lowered in ratio to the other portsto give the incoming fluids a rotary spiral motion; a catch pot in saidfirst mentioned chamber; a smaller venturi leading into said firstmentioned chamber from one side thereof; lea-d lines connecting theVenturi tubes with sources of fluid supply; annular chambers surroundingthe steps; ports connecting said steps with the interior thereof; andlead lines connecting said annular chambers with a source of fluidsupply.

4. In a fueling system the combination of Venturi tube secured to theintake manifold of an internal combustion engine; a chamber under saidVenturi tube; angled chambers leading from said chamber; steps formed inthe top ends of said angled chambers; Venturi tubes formed in the endsof said angled chambers; ports through said steps and ports leading intosaid Ventur'i tubes to introduce fuel into said Venturi tubes and intosaid chambers by the increased suction of air forces passingthe-rethrough; spring controlled valves to control the flow of airthrough said angled Venturi tubes in said chambers; and a valve in thelower .end of said Venturi tube to control the suction therethrough asdesired.

5. In a fueling system for engines the combination of a Venturi tubeformed of .an inverted frustum of a cone formed integral and tangentialto a curved surface and having the extended side walls tapered outwardly from the curve; step cuts formed adjacent the tapered walls; Venturitubes lead ing into a chamber below the step cuts ports from annularchambers into the side walls of the step cuts; ports into the Venturitube at its tangential juncture; an annular chamber around said Venturitube in open connection with said ports; a lead line connecting saidannular chamber in said Vent-uri tube with a source of fluid supply;lead lines connecting the annular chambers around the step cuts with asource of fluid supply; a tapered walled member through the fuel supplytank; Venturi tubes on the upper end of said member; a pipe connectingthe central opening of the chamber below the step cuts with the Venturitube at said tank; a lead line connecting said Venturi tube with theupper vapors on top of said tank; and a valve-to control the suctionthrough said Venturi tube. v

6. In a fueling system for engines the combination of a Venturi tubeformed of .an inverted frustum of a cone formed integral and tangentialto a curved surface and having the extended side walls tapered outwardlyfrom the curve; step cuts formed adjacent the tapered walls; Venturitubes leading into a chamber below the step cuts; ports from annularchambers into the side walls of the step cuts; ports into the Vent-uritube at its tangential juncture; an annular chamber around said Venturitube'in open connection with a said port; a lead line connecting saidannular chamber in said Venturi tube with a source of fluid supply; leadlines connecting the annular chambers around the step cuts with a sourceof fluid supply; a tapered walled member through the fuel supply tank; aVenturi tube on the upper end of said member; a pipe connecting thecentral opening of the chamber below the step cuts with the Venturi tubeat said tank; alead line connecting said Venturi tube with the uppervapors on top of said tank; means in said tank to vaporize; the fuelstherein by aeration; a valve to control the suction through W saidVenturi tube; and spring held valves to control each of the Venturitubes.

7. In a fueling system the combination of a Venturi tube formed oftapered walls in the form of an inverted frustum of a cone formedintegral and tangentially to a curved surface and having the ends of thecurved wall extended and tapered outwardly; a step formed adjacent theends of the said tapered walls; and a chamber formed on said stepextending down through the fuel supply tank; means to connect theVenturi tube with the intake manifold of an automobile; an annularchamber around the Venturi' tube in open connection therewith by angledports leading from the point of smallest constriction of said tube; a.lead line connecting said chamber with the fuel in said supply tank; anannular chamber surrounding said step; ports connecting the interiorbore of said step with said chamber; and a lead line connecting saidbore with a source of fuel supply.

8. In a fueling system for engines the combination of a Venturi tubeformed of an inverted frustum of a cone formed integral and tangentialto a curved surface and having the extended side walls tapered outwardlyfrom the curve; step cuts formed adjacent the ta- I pered walls; Venturitubes leading into a chamber below the step cuts ports from annularchambers into the side walls of the step cuts; ports into the Venturitube at its tangential juncture; an annular chamber around said Venturitube in open connection with said ports; a lead line connecting saidannular chamber in said Venturi tube with a source of fluid supply; leadlines connecting the annular chambers around the step cuts with a sourceof fluid supply; a tapered walled member through the fuel supply tank; aVenturi tube on the upper end of said member; a pipe connecting thecentral opening of the chamber below the step cuts with the Venturi tubeat said tank; a lead line connecting said Venturi tube with the uppervapors on top of said tank; a valve to control the suction through saidVenturi tube; a

valve to control the flow of fuel into the intake manifold and a valveto control the flow of fluids through the lower end of said taperedwalled member in said tank.

9. In a fueling system for engines the combination of a Venturi tubeformed of an inverted frustum of a cone formed integral and tangentialto a curved surface and having the extended side walls tapered outwardlyfrom the curve; step cuts formed adjacent the tapered walls; Venturitubes leading into a chamber below the step cuts; ports from annularchambers into the side walls of the step cuts; a spiral in said taperedwalls; ports into the Venturi tube at its tangential juncture; anannular chamber around said Venturi tube in open connection withsaidports; a lead line connecting said annular chamber in said Venturi tubewith a source of fluid supply; lead lines connecting the annularchambers around the step cuts with a source of fluid supply; a taperedwalled member through the fuel supply tank; a Venturi tube on the upperend of said member; a pipe connecting the central'openings of thechamber below the step cuts'with the Venturi tube at said tank; a leadline connecting said Venturi tube with the upper vapors on top of saidtank; a valve to control the suction through said Venturi tube; andmeans to choke the device when starting theengine. v 1 r .10. In afueling system the combination of a chambersecured' to the intakemanifold; another chamber spaced from the first chamber by steps; aVenturi tube leading into said last mentioned chamber; an annularchamber surrounding the constricted portion of said venturi; portsleading into said venturi from saidchamber; a catch pot in said firstmentioned chamber; a smaller venturi leading into said first mentionedchamber from one side thereof; lead lines connecting the Venturi tubeswith sources of fluid supply; an-

nular chambers surrounding the steps; ports connecting said steps withthe interior thereof; lead lines connecting said annular chambers with asource of fluid supply; and valves to control the flow of fluids throughsaid chamber and said Venturi tubes.

11. In a fueling system the combination of a Venturi tube formed oftapered walls in tank; means to connect the Venturi tube with the intakemanifold of an automobile; an annular chamber around the Venturi tube inopen connection therewith by angled ports leading fromthe point ofsmallest constriction of said tube; a lead line connecting said chamberwith the fuel in said supply tank; an annular chamber surrounding saidstep; ports connecting the interior bore of said step with said chamber;a lead line connecting said bore with a sourceof fuel supply; and meansby a float to direct vapors from said tank directly into said lead linesthrough vertical lead pipes inserted within said first mentioned leadlines.

12. In a vaporizing device for use in fueling systems the combination ofa fuel supply tank carrying an aerator composed of a hollow grill havingports through the bottom side; an inlet pipe leading from above thelevel of the fuel into said grill; means to clean the air passingthrough said inlet pipe;

a float carried within said tank above said' grill; funnel shapedoutlets from said float spaced thereaboveand connectedwith lead;

lines to carry the vapors to the source of consumption; and means toguide said float above said grill.

13. In a fueling system for engines the combination of a Venturi tubeformed with tapered walls tangentially to a curved base withextendedlower Walls; step cuts formed adjacent said walls; ports connecting theinterior of said Venturi tube witha source of fluid supply; portsthrough the vertical walls of said step cuts connected with a source offluid supply; a float chamber mounted below said step cuts; means'tointroduce fuel into said float chamber; and means to control the flow offluids from said float chamber to said ports. V

In testimony whereof I have afixed my signature. p p 7 CLARENCE I.JUSTHEIM.

